warning light FORD F450 SUPER DUTY 2017 Workshop Manual

PRINCIPLE OF OPERATION
WARNINGS
Vehicle modifications involvingbraking system, aftermarket roofracks, suspension, steering system,tire construction and wheel and tire sizemay change the handling characteristicsof your vehicle and may adversely affectthe performance of the electronic stabilitycontrol system. In addition, installing anystereo loudspeakers may interfere withand adversely affect the electronic stabilitycontrol system. Install any aftermarketstereo loudspeaker as far as possible fromthe front center console, the tunnel, andthe front seats in order to minimize the riskof interfering with the electronic stabilitycontrol sensors. Reducing theeffectiveness of the electronic stabilitycontrol system could lead to an increasedrisk of loss of vehicle control, vehiclerollover, personal injury and death.
Remember that even advancedtechnology cannot defy the laws ofphysics. It’s always possible to losecontrol of a vehicle due to inappropriatedriver input for the conditions. Aggressivedriving on any road condition can causeyou to lose control of your vehicleincreasing the risk of personal injury orproperty damage. Activation of theelectronic stability control system is anindication that at least some of the tireshave exceeded their ability to grip the road;this could reduce the operator’s ability tocontrol the vehicle potentially resulting ina loss of vehicle control, vehicle rollover,personal injury and death. If your electronicstability control system activates, SLOWDOWN.
The system automatically turns on eachtime you switch the ignition on.
If a fault occurs in either the stabilitycontrol or the traction control system, youmay experience the following conditions:
•The stability and traction control lightilluminates steadily.
•The stability control and tractioncontrol systems do not enhance yourvehicle's ability to maintain traction ofthe wheels.
•The Adaptive Steering system (ifequipped) automatically changes thesteering function to a fixed steeringratio. See Steering (page 256).
If a driving condition activates either thestability control or the traction controlsystem you may experience the followingconditions:
•The stability and traction control lightflashes.
•Your vehicle slows down.
•Reduced engine power.
•A vibration in the brake pedal.
•The brake pedal is stiffer than usual.
•If the driving condition is severe andyour foot is not on the brake, the brakepedal may move as the system applieshigher brake force.
The stability control system has severalfeatures built into it to help you maintaincontrol of your vehicle:
Electronic Stability Control
The system enhances your vehicle’s abilityto prevent skids or lateral slides byapplying brakes to one or more of thewheels individually and, if necessary,reducing engine power.
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Stability Control

PRINCIPLE OF OPERATION
WARNINGS
Hill descent control cannot controldescent in all surface conditions andcircumstances, such as ice orextremely steep grades. Hill descentcontrol is a driver assist system and cannotsubstitute for good judgment by the driver.Failure to do so may result in loss of vehiclecontrol, crash or serious injury.
Hill descent control does not providehill hold at zero miles per hour (0kilometers per hour). When stopped,the parking brake must be applied or thevehicle must be placed in P (Park) or itmay roll away.
Hill descent control allows the driver to setand maintain vehicle speed whiledescending steep grades in various surfaceconditions.
Hill descent control can maintain vehiclespeeds on downhill grades between 2 mph(3 km/h) and 12 mph (20 km/h). Above 20mph (32 km/h), the system remainsarmed, but descent speed cannot be setor maintained.
Hill descent control requires a coolingdown interval after a period of sustaineduse. The amount of time that the featurecan remain active before cooling varieswith conditions. The system will provide awarning in the message center and a chimewill sound when the system is about todisengage for cooling. At this time,manually apply the brakes as needed tomaintain descent speed.
USING HILL DESCENT
CONTROL
Press and release the hilldescent button located on theinstrument panel. A light in thecluster will illuminate and a chime willsound when this feature is activated.
To increase descent speed, press theaccelerator pedal until the desired speedis reached. To decrease descent speed,press the brake pedal until the desiredspeed is reached.
Whether accelerating or decelerating, oncethe desired descent speed is reached,remove your feet from the pedals and thechosen vehicle speed will be maintained.
Note:Noise from the ABS pump motor maybe observed during hill descent controloperation. This is a normal characteristic ofthe ABS and should be no reason forconcern.
Hill descent modes
•At speeds below 20 mph (32 km/h):When the Hill Descent Control switchis pressed and Hill Descent Control isactive, the Hill Descent Control telltalewill flash.
•At speeds below 20 mph (32 km/h):When the Hill Descent Control switchis pressed and conditions are notcorrect for hill descent activation, theHill Descent Control system will beenabled, the Hill Descent Controltelltale will be solid and a message willdisplay in the information display.
•At speeds above 20 mph (32 km/h):When the Hill Descent Control switchis pressed, the Hill Descent Controlsystem will be enabled, the telltale inthe cluster will not be illuminated anda message will be displayed in theinformation display.
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Terrain Control (If Equipped)E163957

The controls for using your cruise controlare located on the steering wheel.
Switching the System On
Press and release ON.
The information display showsthe grey indicator light.
The current gap setting and SET alsoshows.
Setting a Speed
1. Accelerate to the desired speed.
2. Press and release SET+. The memorystores the vehicle speed.
3.The information display shows a greenindicator light, current gap setting andthe desired set speed.
4. Take your foot off the acceleratorpedal.
5.A lead vehicle graphic illuminates if thesystem detects a vehicle in front of you.
Note:When adaptive cruise control isactive, the speedometer may vary slightlyfrom the set speed displayed in theinformation display.
Following a Vehicle
WARNINGS
When following a vehicle, yourvehicle does not decelerateautomatically to a stop, nor doesyour vehicle always decelerate quicklyenough to avoid a crash without driverintervention. Always apply the brakes whennecessary. Failing to do so may result in acrash, serious injury or death.
Adaptive cruise control only warnsof vehicles detected by the radarsensor. In some cases there may beno warning or a delayed warning. Alwaysapply the brakes when necessary. Failureto do so may result in a crash, serious injuryor death.
Note:The brakes may emit a sound whenthe adaptive cruise control system is active.
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Cruise Control (If Equipped)E183737 E144529 E233874 E233874

When a vehicle ahead of you enters thesame lane or a slower vehicle is ahead inthe same lane, the vehicle speed adjuststo maintain a preset gap distance. Thedistance setting is adjustable.
The lead vehicle graphic illuminates.
The vehicle maintains a constant distancefrom the vehicle ahead until:
•The vehicle in front of you acceleratesto a speed above the set speed.
•The vehicle in front of you moves outof your lane or out of view.
•The vehicle speed falls below 12 mph(20 km/h).
•You set a new gap distance.
The system applies the brakes to slow thevehicle to maintain a safe distance fromthe vehicle in front. The system appliesonly limited maximum braking. Press thebrake pedal to override the system.
If the system predicts that its maximumbraking level is insufficient, an audiblewarning sounds while the systemcontinues to brake. A red warning barappears on the windshield heads-updisplay. Take immediate action to slow orstop the vehicle.
The system may provide slight temporaryacceleration when you use your driver sidedirectional indicator while following a leadvehicle, to aid in passing the vehicle.
Setting the Gap Distance
Note:It is your responsibility to select a gapappropriate to the driving conditions.
Gap decrease.A
Gap increase.B
Press the gap control to decrease orincrease the distance between your vehicleand the vehicle in front of you.
Bars in the graphic show the selected gapdistance. You can select between four gapsettings.
Note:When you select Tow/Haul Mode,the gap distance is increased slightly.
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Cruise Control (If Equipped)E183739 E233874

ActionCause
Clean the grille surface in front of the radaror remove the object causing the obstruc-tion.
The surface of the radar in the grille is dirtyor obstructed in some way.
Wait a short time. It may take severalminutes for the radar to detect that it is freefrom obstruction.
The surface of the radar in the grille is cleanbut the message remains in the display.
Do not use the system in these conditionsbecause it may not detect any vehiclesahead.
Heavy rain or snow is interfering with theradar signals.
Do not use the system in these conditionsbecause it may not detect any vehiclesahead.
Swirling water, or snow or ice on the surfaceof the road may interfere with the radarsignals.
Wait a short time or switch to normal cruisecontrol.You are in a desert or remote area with noother vehicles and no roadside objects.
Due to the nature of radar technology, it ispossible to get a blockage warning and nothave a blockage. This can happen, forexample, when driving in sparse rural ordesert environments. A false blockedcondition either self clears or clears aftera key cycle.
Switching to Normal CruiseControl
WARNING
Normal cruise control will not brakewhen your vehicle is approachingslower vehicles. Always be aware ofwhich mode you have selected and applythe brakes when necessary.
You can manually change from adaptivecruise control to normal cruise controlthrough the information display. SeeInformation Messages (page 128).
The cruise control indicator lightreplaces the adaptive cruisecontrol indicator light if youselect normal cruise control. The gapsetting does not display, the system doesnot automatically respond to lead vehiclesand automatic braking remains active tomaintain set speed. The system recalls itslast setting when you start your vehicle.
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Cruise Control (If Equipped)E71340

Why is the feature not available (line markings are gray) when I can see the lane markingson the road?
Previous feature activation happened within the last one second
Ambiguous lane markings (mainly in construction zones)
Rapid transition from light to dark or vice versa
Sudden offset in lane markings
ABS or AdvanceTrac activation
Camera blockage due to dirt, grime, fog, frost or water on the windshield
Driving too close to the vehicle in front of you
Transitioning between no lane markings to lane markings or vice versa
Standing water on the road
Faint lane markings (partial yellow lane markings on concrete roads)
Lane width too narrow or too wide
Camera not calibrated after a windshield replacement
Driving on tight roads or on uneven roads
Vehicle accessories such as snow plows
BLIND SPOT INFORMATION
SYSTEM (If Equipped)
WARNING
Never use the Blind SpotInformation System as areplacement for using the interiorand exterior mirrors or looking over yourshoulder before changing lanes. The BlindSpot Information System is not areplacement for careful driving.
Note:The Blind Spot Information Systemdoes not prevent contact with other vehiclesor objects; nor detect parked vehicles,people, animals or infrastructure (fences,guardrails, trees). It is only designed to alertyou to moving vehicles in the blind spotzones.
Note:When a vehicle passes quicklythrough the blind spot zone, typically fewerthan two seconds, the system does nottrigger.
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Driving Aids

Setting up a Blind Spot Trailer
Trailer lengthA
Trailer widthB
Trailer hitch ballC
You can set-up any trailer to work with theBlind Spot Information System with TrailerTow through the instrument cluster menu.See General Information (page 111).While setting up a trailer, a sequence ofscreens appear asking for trailerinformation. The Blind Spot InformationSystem with Trailer Tow specific screensare described below:
•Select type of trailer screen -Conventional, fifth wheel or gooseneck.
The Blind Spot Information System withTrailer Tow only supports conventionaltrailers. If fifth wheel or gooseneck isselected, the system automatically turnsoff.
•Do you want to set up BLIS with trailerscreen?
If no, the Blind Spot Information Systemturns off.
If yes, the menu goes to the next screen.
•Is the width less than 9 ft (2.7 m) andlength less than 30 ft (9 m)?
If no, the Blind Spot Information Systemturns off.
If yes, the menu goes to the next screen.
•Trailer width measurement:
The width of the trailer is measured at thefront of the trailer. It is not measured at thewidest point of the trailer. The maximumwidth at the front of the trailer that theBlind Spot Information System with TrailerTow can support is 8.5 ft (2.6 m).
Note:You do not need to enter an exacttrailer width measurement; just measurethat it is 8.5 ft (2.6 m) or less.
•Trailer length measurement:
The trailer length is the distance betweenthe trailer hitch ball and the rear of thetrailer. The maximum length that the BlindSpot Information System with Trailer Towcan support is 30 ft (9 m).
•Enter length of trailer:
The default setting is 18 ft (5.5 m).Toggling up or down using the menubuttons will increase/decrease themeasurement by 3 ft (1 m). Select thelength so that the value is equal to orwithin 3 ft (1 m) of the actual measuredlength. For example, if the actual measuredlength is 25 ft (7.6 m), then toggle thelength in the menu to 27 ft (8.2 m). Whenthe length has been entered, the Blind SpotInformation System with Trailer Tow setupis saved.
If you do not set up a Blind Spot Trailer, awarning appears in the instrument clusterwhen a trailer is connected stating that thesystem has been turned off due to a trailerconnect.
Note:If the trailer is actually a bike rack orcargo rack with electrical lighting, then thelength will be 3 ft (1 m). Cross Traffic Alertwill remain on for trailers 3 ft (1 m) or less.
Note:Proper measurement andmeasurement entry is required for BlindSpot Information System with Trailer Towto function as designed.
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Driving AidsE225008

COLLISION WARNING SYSTEM
(If Equipped)
Principle Of Operation (If Equipped)
WARNINGS
This system is an extra driving aid. Itdoes not replace your attention andjudgment, or the need to apply thebrakes. This system does NOTautomatically brake your vehicle. If you failto press the brake pedal when necessary,you may collide with another vehicle.
The collision warning system withbrake support cannot help preventall collisions. Do not rely on thissystem to replace your judgment and theneed to maintain correct distance andspeed.
Note:The system does not detect, warn orrespond to potential collisions with vehiclesto the rear or sides of your vehicle.
Note:The collision warning system is activeat speeds above approximately 5 mph(8 km/h).
Note:The collision warning system will beunavailable if you disable the electronicstability control. See Using StabilityControl (page 227).
The system alerts you of certain collisionrisks. The system's sensor detects yourvehicle's rapid approach to other vehiclestraveling in the same direction as yourvehicle.
When your vehicle rapidly approachesanother vehicle, a red warning light flashesand a tone sounds.
The brake support system assists you inreducing any collision speed bypre-charging the brakes. If the risk ofcollision continues to increases after theaudio-visual warning, the brake supportprepares the brake system for rapidbraking. The system does notautomatically activate the brakes, but ifthe brake pedal is pressed even lightly, thebrakes apply full stopping power.
Using the Collision Warning System
WARNING
The collision warning system’s brakesupport reduces collision speed onlyif you brake your vehicle before anycollision. As in any typical braking situation,you must press your brake pedal.
You can use your information displaycontrol to adjust the collision warningsystem's sensitivity or to turn the systemOn or Off. Your vehicle will rememberthese settings across key cycles. You maychange the collision warning systemsensitivity to any one of three possiblesettings. See General Information (page111).
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Driving AidsE156130 E156131

TOWING A TRAILER
WARNINGS
Towing trailers beyond themaximum recommendedgross trailer weight exceeds thelimit of your vehicle and couldresult in engine damage,transmission damage, structuraldamage, loss of vehicle control,vehicle rollover and personalinjury.
Do not exceed the GVWR orthe GAWR specified on thecertification label.
Note: See RecommendedTowing Weights (page 277).
Your vehicle may have electricalitems, such as fuses or relays,related to towing. See Fuses(page 312).
Your vehicle's load capacitydesignation is by weight, not byvolume, so you cannot necessarilyuse all available space whenloading a vehicle or trailer.
Towing a trailer places an extraload on your vehicle's engine,transmission, axle, brakes, tiresand suspension. Inspect thesecomponents periodically during,and after, any towing operation.
Load Placement
To help minimize how trailermovement affects your vehiclewhen driving:
•Load the heaviest items closestto the trailer floor.
•Load the heaviest itemscentered between the left andright side trailer tires.
•Load the heaviest items abovethe trailer axles or just slightlyforward toward the trailertongue. Do not allow the finaltrailer tongue weight to goabove or below 10-15% of theloaded trailer weight.
•Select a ball mount with thecorrect rise or drop and loadcapacity. When both theloaded vehicle and trailer areconnected, the trailer frameshould be level, or slightlyangled down toward yourvehicle, when viewed from theside.
When driving with a trailer orpayload, a slight takeoff vibrationor shudder may be present due tothe increased payload weight.Additional information regardingproper trailer loading and settingyour vehicle up for towing islocated in another chapter of thismanual. See Load Limit (page261).
You can also find information inthe RV & Trailer Towing Guideavailable at your authorizeddealer, or online.
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Towing

slowly turning the wheel until the traileris following your desired path and thenholding the wheel in that position. Ifyou would like to recalibrate thesystem for straight backing, you can doso with the following procedure.
•Go into the trailer menu, selecttrailer options, select change trailersetting and then select the changesticker option. Your savedmeasurements will be displayed.Do not change them but continueto confirm measurements. Onceyou confirm the measurements, thesystem will then prompt you toperform the calibration procedure.
Note:The system is designed to be usedwith the same trailer connection every timethe trailer is chosen from the selectionmenu. Using a different drawbar or adifferent pin hole (on drawbars with morethan one) when connecting the drawbar toyour vehicle will affect the trailermeasurements. Take the measurementsagain and update if required.
TRAILER SWAY CONTROL (If
Equipped)
WARNING
Turning off trailer sway controlincreases the risk of loss of vehiclecontrol, serious injury or death. Forddoes not recommend disabling this featureexcept in situations where speed reductionmay be detrimental (such as hill climbing),the driver has significant trailer towingexperience, and can control trailer swayand maintain safe operation.
Note:This feature does not prevent trailersway, but reduces it once it begins.
Note:This feature cannot stop all trailersfrom swaying.
Note:In some cases, if vehicle speed is toohigh, the system may activate multipletimes, gradually reducing vehicle speed.
This feature applies your vehicle brakes atindividual wheels and, if necessary, reducesengine power. If the trailer begins to sway,the stability control light flashes and themessage TRAILER SWAY REDUCESPEED appears in the information display.The first thing to do is slow your vehicledown, then pull safely to the side of theroad and check for proper tongue load andtrailer load distribution. See LoadCarrying (page 261).
RECOMMENDED TOWING
WEIGHTS
WARNING
You must use the heavy-dutydrawbar pin supplied with
your vehicle when using theheavy-duty hitch. Failure to followthis instruction could result in theloss of control of your vehicle,personal injury or death.
Note:Vehicles with a heavy-dutyhitch must use the drawbar pinstamped 21,000 LBS. You canobtain a replacement drawbar pinat your Ford dealer.
Note:Make sure to take intoconsideration trailer frontal area.Do not exceed 60 feet2 (5.6
meters2) trailer frontal area for
conventional trailers. Do notexceed 75 feet2 (6.9 meters2) trailer
frontal area for 5th wheel andgooseneck trailers.
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Towing